They moved to New York right after college, had me a few years later, then moved to a brick townhouse in North River Heights, the hippie-stroller capital of upper upper Manhattan, when I was about a year old.

What does "hippie-stroller" mean here?

Question

They moved to New York right after college, had me a few years later, then moved to a brick townhouse in North River Heights, the hippie-stroller capital of upper upper Manhattan, when I was about a year old.

What does "hippie-stroller" mean here?

Answer

It would be a place where a lot of "hippies" would live. Hippies were part of a fashion trend in the 60's and 70's that were very liberal, free spirited people who preached peace and love.